9999288 has 80 divisors (see below), whose sum is σ = 30187080. Its totient is φ = 3074112.

The previous prime is 9999277. The next prime is 9999289. The reversal of 9999288 is 8829999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7831 + ... + 9017.

Almost surely, 2^9999288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15093540).

9999288 is an abundant number, since it is smaller than the sum of its proper divisors (20187792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999288 is a wasteful number, since it uses less digits than its factorization.

9999288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1205 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 9999288 is about 3162.1650810797. The cubic root of 9999288 is about 215.4383556902.

The spelling of 9999288 in words is "nine million, nine hundred ninety-nine thousand, two hundred eighty-eight".